Abstract：As the most widely distributed and the thickest deposited stratigraphic unit in Beijing area，the Mesoproterozoic Wumishan Formation was mainly composed of dolostone and siliceous dolostone and was basically formed in a relatively long stable peritidal environment.The sedimentary records formed in such environment are allergically to the changes of palaeoearthquakes and are rather easily preserved.Numerous soft-sediment deformation structures of palaeoearthquake origin have been identified in the upper part of Wumishan Formation along the Yongding River Valley(from Zhuanghuwa to Zhenzhu Lake).Typical soft-sediment structures described in this paper include liquefied structures(liquefied mixed layer，diapir，liquefied vein，liquefied convolute bedding)，compressional deformation structures(intense fold，plate-spine breccia structures，mound-and-sag structure)，extensional structures(loop-bedding，extensional pudding) and brittle deformation structures(ground fissure，intrastratal fault，seismic cracked breccia).Formation processes of typical soft-sediment deformation structures are morphologically simulated by computer.Combined the regional geological background and former geologists research achievements，the movement of main fault along the axial region of Yan-Liao aulacogen is identified as the triggering fault of palaeoearthquake since the Early Mesoproterozoic.According to the frequencies of soft-sediment deformation structures，the occurrence frequency of palaeoearthquake of the Wumishan depositional period is calculated as between 32 thousand years to 20 thousand years.
Su Dechen,Sun Aiping. Soft-sediment deformation and occurrence frequency of palaeoearthquake in the Mesoproterozoic Wumishan Formation， Yongding River Valley，Beijing[J]. JOPC, 2011, 13(6): 591-614.
北京市地质矿产局.1991.北京市区域地质志［M］.北京:地质出版社，68-81. 杜远生，韩欣.2000.论震积作用和震积岩［J］.地球科学进展，15（4）:389-394. 段吉业，刘鹏举，万传彪.2002.华北燕山中—新元古代震积岩系及其地震节律［J］.地质学报，76(4):441-445. 和政军，宋天锐，丁孝忠，等.2000.燕山中元古代裂谷早期同沉积断裂活动及其对事件沉积的影响［J］.古地理学报，2(3):83-91. 梁定益，聂泽同，宋志敏，等.2009.北京房山世界地质公园中元古界雾迷山组地震—海啸序列及地质特征［J］.地质通报，28(1):30-37. 梁定益，聂泽同，宋志敏.1994.再论震积岩及震积不整合：以川西，滇西地区为例［J］.地球科学，19(6):845-850. 梁定益，宋志敏，赵崇贺，等.2002.河北省白石山中元古代地震遗迹的发现［J］.地质通报，21(10):625-630. 梁定益，聂泽同，万晓樵，等.1991.试论震积岩及震积不整合——以川西、滇西地区为例［J］.现代地质，5(2):138-146. 刘鹏举.2001.河北平泉中元古代高于庄组震积岩及地震节律［J］.现代地质，15（3）: 266-268. 梅冥相，马永生，郭庆银.2001.天津蓟县雾迷山旋回层基本模式及其马尔柯夫链分析［J］.高校地质学报，7（3）:288-299. 乔秀夫.2002.中朝板块元古宙板内地震带与盆地格局［J］.地学前缘，9(3):141-150. 乔秀夫，高林志.2007.燕辽裂陷槽中元古代古地震与古地理［J］.古地理学报，9(4):337-352. 乔秀夫，高林志，彭阳.2001.古郯庐带沧浪铺阶地震事件、层序及构造意义［J］.中国科学(D辑)，31(11):911-918. 乔秀夫，李海兵.2009.沉积物的地震及古地震效应［J］.古地理学报，11(6):593-610. 乔秀夫，宋天锐，高林志，等.1994.碳酸盐岩振动液化地震序列［J］.地质学报，68（1）:16-34. 乔秀夫，宋天锐，高林志，等.2006.地层中地震记录（古地震）［M］.北京：地质出版社，1-263. 宋天锐.1988.北京十三陵前寒武纪碳酸盐岩地层中的一套可能的地震—海啸序列［J］.科学通报，38(8):609-611. 田洪水，张增奇，杜圣贤.2006.山东临朐红丝石层中的古地震记录［J］.中国地质，33(5):1137-1148. 王松山，桑海清，裘冀，等.1995.蓟县雾迷山组和杨庄组形成年龄的研究［J］.地质科学，30(2): 166-172. 张传恒，刘典波，张传林，等.2006.新疆博格达地区早二叠世软沉积物变形构造.弧后碰撞前陆盆地地震记录［J］.地学前缘，13(4):255-266. 张传恒，武振杰，高林志，等.2007.雾迷山组中地震驱动的软沉积物变形构造及其地质意义［J］.中国科学(D辑)，27(3):336-342. Ettensohn Frank R，Zhang C，Lierman R.2011.Soft-sediment deformation in epicontinental carbonates as evidence of paleoseismicity with evidence for a possible new seismogenic indicator: Accordion folds［J］.Sedimentary Geology， 235: 222-233. Fairchild I J，Einsele G，Song T R.1997.Possible seismic origin of molar tooth structure in Neoproterezoic carbonate ramp deposits，North China［J］.Sedimentology，44: 611-636. Qiao Xiufu，Gao Linzhi，Peng Yang.2007.Mesoproterozoic earthquake event and breakup of the Sino-Korean Plate［J］.Acta Geologica Sinica(English Edition)，81(3):385-397. Qiao Xiufu，Song Tianrui，Gao Linzhi， et al.1994.Seismic sequence in carbonate rocks by vibrational liquefaction［J］.Acta Geologica Sinica，7(3):243-265. Rodriguez-Pascua M A，Calvo J P，Vicete G D， et al.2000.Soft-sediment deformation structure interpreted as seismites in lacustrine sediments of the Prebetic Zone，SE Spain，and their potential use as indicators of earthquake magnitudes during the Late Miocene［J］.Sedimentary Geology，135: 117-135. Rossetti Dilce F，Bezerra F H，Góes Ana M， et al.2011.Sediment deformation in Miocene and post-Miocene strata，Northeastern Brazil：Evidence for paleoseismicity in a passive margin［J］.Sedimentary Geology，235:172-187. Rossetti Dilce F, Goes, Werner Truckenbrodt, et al.2000.Tsunami-induced large-scale scour- and- fill seructures in Late Albian to Cenomanian deposits of the Grajau Basin, northern Brazil［J］.Sedimentology, 47(2):309-323.王 媛
